CHI05CA240 · Piper PA-12
Piper PA-12 · Accident: airframe, component or system failure during landing
From Boscobel Airport (OVS) to an unrecorded destination
Event
- NTSB case
- CHI05CA240
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Piper PA-12
- Aircraft type
- Piper PA-12
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N425AH
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Boscobel Airport (OVS), Boscobel, WITo not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Landing
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Airframe, component or system failure
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Landing gear, main gear attachment › Separation
- Pilot in command(cfi) › Aircraft control, not possible
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The tailwheel airplane piloted by a certified flight instructor, sustained substantial damage on impact with terrain when the right main landing gear broke during the landing. The flight instructor stated, "After landing on the hard surface of runway 20, the airplane started a mild left turn towards the grass on the side of the runway. A bolt had broken on the right main gear attach bracket. The right gear folded under the airplane at about 15 mph. The gear broke and pushed the plane up in the air about 5 feet and then fell. The prop stuck in the ground. The wing bent outboard. No injuries."
Probable cause
The separation of the right main landing gear attachment bracket bolt during the landing and the pilot's aircraft control not possible with the collapsed gear.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI05CA240
- Event ID
- 20050901X01361
- Case number
- CHI05CA240
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: local date, investigation status, coordinates. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2005-08-20.
- API snapshot SHA-256: c867d4b90ead75c1fb73fb804b00b83fd4b709470cc112a4ddece98f8de58a29; retrieved 2026-09-22T05:28:20.361Z.